Changes: dotnet/java-interop@02bceb0...19be370

* [Java.Interop.Tools.Generator] Improve `ExtractApiLevel()` resiliency

Changes: dotnet/java-interop@19be370...0ad0d40

* [generator] Revert changes to [UnsupportedOSPlatform]

Context: #10509

These should already be working on `release/10.0.1xx`, due to changes already reverted.

Update an existing test for #10509.

Context: dotnet/macios#23701
Context: #10453

In 398602e, we moved to the new `MicroBuildTemplate` and `v4` signing template.

It appears there is an additional file we need for `real` signing to work.

When cherry-picking the commit, I noticed:

    Updating 61674e1..e04201b
    Fast-forward
    .../policies/branchClassification.yml\342\200\216"          | 13 +++++++++++++
    1 file changed, 13 insertions(+)
    create mode 100644 ".azuredevops/policies/branchClassification.yml\342\200\216"

`\342\200\216` indicated some weird invisible character!

I must have done this when copy-pasting the file path from GitHub's
web UI?

Rename the file to the correct name:

    Changes to be committed:
        renamed:    ".azuredevops/policies/branchClassification.yml\342\200\216" -> .azuredevops/policies/branchClassification.yml

This will supposedly resolve our signing issues, so I removed this
value and copied the condition in each location.